1. State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, China
2. Sichuan Provincial Center for Gynaecology and Breast Diseases, The Affiliated Hospital of Southwest Medical University, Luzhou, China
3. School of Public Health and Management, Chongqing Medical University, Chongqing, China
4. Department of Obstetrics and Gynecology, Chung Shan Medical University Hospital, Taichung, Taiwan
5. Department of Obstetrics and Gynecology, Affiliated Hospital of Zunyi Medical University, Zunyi, China
6. Department of Obstetrics and Gynecology, Nanchong Central Hospital, The Second Clinical Medical College, North Sichuan Medical University, Nanchong, China
7. Department of Radiology, The Affiliated Hospital of Southwest Medical University, Luzhou, China